When a computer needs a piece of information, does it immediately perform the memory fetch operation? If not, what does it do?
What will be an ideal response?
When the computer needs a piece of information, it does not immediately do the memory fetch operation. First, the computer looks in cache memory to see whether the information is there. If it is, then the computer can access it at a higher speed of the cache. Second, if the desired information is not in the cache, then it accesses it from RAM at the slower speed, using the fetch operation. Finally, the data just fetched is copied into the cache along with the appropriate immediately following memory locations. If the cache is full, then some of the older items that have not been recently accessed are discarded. (The assumption is that they will not be needed again for a while.)
You might also like to view...
Forms are used to enter data and to make it easier for users to use the database. Anything you can do to make the form simpler will make it less likely that the user makes a mistake
Indicate whether the statement is true or false
The cost of computing power and communications bandwidth has been
a) about the same each year. b) going up. c) going down dramatically. d) undetermined.